Tungsten modified by potassium doping and rhenium addition for fusion reactor applications

Shuhei Nogami, Akira Hasegawa, Makoto Fukuda, Shotaro Watanabe, Jens Reiser, Michael Rieth

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Low temperature brittleness, high ductile-to-brittle transition temperature (DBTT), and recrystallization-induced embrittlement are potential drawbacks related to the thermo-mechanical properties of tungsten (W) for application to the plasma facing materials of future fusion reactor divertors. To improve the thermo-mechanical properties of W, potassium (K) doping and rhenium (Re) addition have been applied as a dispersion-strengthening and a solid solution alloying methods, respectively. In this paper, the individual and synergistic effects of K-doping and Re-addition on the recrystallization behavior, tensile properties, and Charpy impact properties of W plate fabricated by powder metallurgy and hot rolling were investigated.

Original languageEnglish
Article number111445
JournalFusion Engineering and Design
Volume152
DOIs
Publication statusPublished - 2020 Mar

Keywords

  • Mechanical property
  • Potassium doping
  • Recrystallization
  • Rhenium addition
  • Tungsten

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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